FLAG=$18000
STAT=$18004
BUF=$20000
        org $10000
start:  move.l #1,FLAG.l
        moveq  #$46,d0
        move.l #$80000000,d1
        moveq  #0,d2
        move.l #256,d3
        lea    BUF,a1
        trap   #15
        move.l d0,STAT.l
        move.l #$FF,FLAG.l
stop:   bra.s  stop